AT&T subscribers, if you are wondering when you will be getting your hands on your pre-order Samsung Galaxy S3, it seems that the 21st of June could be a date you’ll want to look forward to. Discovered by a reader of the website, Droid Matters, it seems that he, as an AT&T Premier customer, spotted on AT&T’s website that the Samsung Galaxy S3 is expected to arrive on or before the 21st of June. This seems to corroborate earlier speculation that the phone could arrive on the 18th, which we guess is before the 21st. However the 21st of June isn’t too surprising given that the other carriers such as T-Mobile and Sprint will be shipping their Galaxy S3 handsets for a 21st of June release as well. Of course this leaves Verizon subscribers as being last to the party as their Galaxy S3 is expected to arrive on the 9th of July. So, anyone planning on skipping school/work and staying home to receive their Galaxy S3?